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Harry_the_cat

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Mar 16, 2016
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View attachment 34097
I have used a calculator for this and got 192. Question how do I find these without a calculator is there a method that anyone knows?
[math]tan(30°) = \frac{ \sqrt{3}}{2}[/math]0
[math]tan(60^{\circ}) = \sqrt{3}[/math][math]12 × \frac{\sqrt{3}}{2} +2 × \sqrt{3} = 8\sqrt{3}[/math]
I think everyone missed it, but I think, on your first line of working, you mean \(\displaystyle cos 30^o=\frac{\sqrt{3}}{2}\)
 
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